"you gave a solution.thats the point for me."

"Paul ,you saved me !!
it was the ECC.

thanks again "

"Do you think Paul is it better to update also the FW (V1.13) ?
 "

"hello everyone !
I bought RFD900+ yesterday and still cannot connect with genuine 3dr modems.
net id are the same etc , FW is V1.9 on both of them.....
RFD tools V1.6 crashes some time....(Win10)
 
Can anyone help?
thanks"

"more or less deltawings are more sensitive to winds and more difficult to fly.
i think that apm or pixhawk cannot easy handle stalls, although they have STALL_PREVENTION."